An online hybrid test was carried out on a 40-story 120-m high concrete shear wall structure. The structure was divided into two substructures whereby a physical model of the bottom three stories was tested in the lab...An online hybrid test was carried out on a 40-story 120-m high concrete shear wall structure. The structure was divided into two substructures whereby a physical model of the bottom three stories was tested in the laboratory and the upper 37 stories were simulated numerically using ABAQUS. An overlapping domain method was employed for the bottom three stories to ensure the validity of the boundary conditions of the superstructure. Mixed control was adopted in the test. Displacement control was used to apply the horizontal displacement, while two controlled force actuators were applied to simulate the overturning moment, which is very large and cannot be ignored in the substructure hybrid test of high-rise buildings. A series of tests with earthquake sources of sequentially increasing intensities were carried out. The test results indicate that the proposed hybrid test method is a solution to reproduce the seismic response of high-rise concrete shear wall buildings. The seismic performance of the tested precast high-rise building satisfies the requirements of the Chinese seismic design code.展开更多
Firstly, relevant stress properties of millisecond level breaking process and microsecond level commutation process of hybrid HVDC circuit breaker are studied in detail on the basis of the analysis for the application...Firstly, relevant stress properties of millisecond level breaking process and microsecond level commutation process of hybrid HVDC circuit breaker are studied in detail on the basis of the analysis for the application environment and topological structure and operating principles of hybrid circuit breakers, and key stress parameters in transient state process of two time dimensions are extracted. The established digital simulation circuit for PSCAD/EMTDC device-level operation of the circuit breaker has verified the stress properties of millisecond level breaking process and microsecond level commutation process. Then, equivalent test method, circuits and parameters based on LC power supply are proposed on the basis of stress extraction. Finally, the results of implemented breaking tests for complete 200 kV circuit breaker, 100 kV and 50 kV circuit breaker units, as well as single power electronic module have verified the accuracy of the simulation circuit and mathematical analysis. The result of this paper can be a guide to electrical structure and test system design of hybrid HVDC circuit breaker.展开更多
This paper analyzes characteristics of multi type current transformers hybrid operation for each branch of the bus and their effects on differential protection of the bus. By theoretically analyzing transmission chara...This paper analyzes characteristics of multi type current transformers hybrid operation for each branch of the bus and their effects on differential protection of the bus. By theoretically analyzing transmission characteristics of multi type current transformers and their influence factors, we study the dynamic model testing method of multi type current transformers for the bus, and design 3 kinds of testing schemes by making the equivalent model based on the field of P-level current transformer, TPY-level current transformer and electronic current transformer, and build the hybrid operation testing platform of multi type current transformers. Finally, we compare and analyze the transmission characteristics difference of multi type current transformers on the same branch and the characteristics difference of hybrid operation in two successive external faults, analyze the cause behind the differences, and put forward the corresponding improvement measures.展开更多
大型复杂数值子结构的实时计算是实时混合试验的关键问题。针对这一问题,基于快速非线性分析法(FNA)的基本思想,提出了一种显式非线性振型叠加法(ENMS),能大幅提升数值子结构的求解效率。阐述了ENMS法的核心原理,针对桥梁-阻尼器后处理...大型复杂数值子结构的实时计算是实时混合试验的关键问题。针对这一问题,基于快速非线性分析法(FNA)的基本思想,提出了一种显式非线性振型叠加法(ENMS),能大幅提升数值子结构的求解效率。阐述了ENMS法的核心原理,针对桥梁-阻尼器后处理模型,设计了一个集虚拟作动器、时滞补偿器、数模转换器及滤波器等关键模块的硬实时混合仿真平台,并通过RTW(Real Time Workshop)实现实时运行,可确保仿真过程的实时性和结果的可靠性。通过采用所述仿真平台仿真,验证ENMS法在实时混合试验的适用性与计算效率。结果表明:考虑到数值模型简化、工控机噪声等因素,采用ENMS法的实时混合试验仿真结果准确,可用于大型复杂结构的动力学行为分析;进一步地,该方法能大幅提升数值子结构的求解效率,实现数值子结构实时求解。展开更多
基金State Key Research Project in 13th Five-Year under Grant No.2016YFC0701901the Beijing Science and Technology Program under Grant No.Z161100001216015the Natural Science Foundation of China under Grants Nos.51422809 and 51778342
文摘An online hybrid test was carried out on a 40-story 120-m high concrete shear wall structure. The structure was divided into two substructures whereby a physical model of the bottom three stories was tested in the laboratory and the upper 37 stories were simulated numerically using ABAQUS. An overlapping domain method was employed for the bottom three stories to ensure the validity of the boundary conditions of the superstructure. Mixed control was adopted in the test. Displacement control was used to apply the horizontal displacement, while two controlled force actuators were applied to simulate the overturning moment, which is very large and cannot be ignored in the substructure hybrid test of high-rise buildings. A series of tests with earthquake sources of sequentially increasing intensities were carried out. The test results indicate that the proposed hybrid test method is a solution to reproduce the seismic response of high-rise concrete shear wall buildings. The seismic performance of the tested precast high-rise building satisfies the requirements of the Chinese seismic design code.
基金supported by SGCC Scientific and Technological Project(52110116004W)
文摘Firstly, relevant stress properties of millisecond level breaking process and microsecond level commutation process of hybrid HVDC circuit breaker are studied in detail on the basis of the analysis for the application environment and topological structure and operating principles of hybrid circuit breakers, and key stress parameters in transient state process of two time dimensions are extracted. The established digital simulation circuit for PSCAD/EMTDC device-level operation of the circuit breaker has verified the stress properties of millisecond level breaking process and microsecond level commutation process. Then, equivalent test method, circuits and parameters based on LC power supply are proposed on the basis of stress extraction. Finally, the results of implemented breaking tests for complete 200 kV circuit breaker, 100 kV and 50 kV circuit breaker units, as well as single power electronic module have verified the accuracy of the simulation circuit and mathematical analysis. The result of this paper can be a guide to electrical structure and test system design of hybrid HVDC circuit breaker.
文摘This paper analyzes characteristics of multi type current transformers hybrid operation for each branch of the bus and their effects on differential protection of the bus. By theoretically analyzing transmission characteristics of multi type current transformers and their influence factors, we study the dynamic model testing method of multi type current transformers for the bus, and design 3 kinds of testing schemes by making the equivalent model based on the field of P-level current transformer, TPY-level current transformer and electronic current transformer, and build the hybrid operation testing platform of multi type current transformers. Finally, we compare and analyze the transmission characteristics difference of multi type current transformers on the same branch and the characteristics difference of hybrid operation in two successive external faults, analyze the cause behind the differences, and put forward the corresponding improvement measures.
文摘大型复杂数值子结构的实时计算是实时混合试验的关键问题。针对这一问题,基于快速非线性分析法(FNA)的基本思想,提出了一种显式非线性振型叠加法(ENMS),能大幅提升数值子结构的求解效率。阐述了ENMS法的核心原理,针对桥梁-阻尼器后处理模型,设计了一个集虚拟作动器、时滞补偿器、数模转换器及滤波器等关键模块的硬实时混合仿真平台,并通过RTW(Real Time Workshop)实现实时运行,可确保仿真过程的实时性和结果的可靠性。通过采用所述仿真平台仿真,验证ENMS法在实时混合试验的适用性与计算效率。结果表明:考虑到数值模型简化、工控机噪声等因素,采用ENMS法的实时混合试验仿真结果准确,可用于大型复杂结构的动力学行为分析;进一步地,该方法能大幅提升数值子结构的求解效率,实现数值子结构实时求解。
